The CAAD group at our Institute decided to use computer and CAAD-software in a creative way. For this reason we choose CAAD-software which is open, flexible and does not impose strict limitations on design exploration. Our primary goal is to investigate the use of the computer in the very first stages of the design process (upstream). Hence we are interested in ways to make CAAD-software more 'architect-minded' (i.e. the operational structure should be as close as possible to the thinking of the architect and the logic of the creative design process) such that it stimulates the creativity of the architect. In order to reach these goals, we try to stimulate the reflection of the students about these items.